so I'm new to PCSX2 and I finally have everything downloaded and set up right (to my knowledge) but everytime i try to execute or run a game i get one message that says "pixel shader version is to low" then another that says "the GS plugin failed to open/initialize"

the first time i got pcsx2 started it made me update my directx but now im just getting this and don't know how to fix it cause when i configure my graphics there is nothing in the dropbox for pixelshader.

cpu - AMD athlon 64 X2 dual core processor 3800+ 2.00 GHz
Ram - 1 gb
Graphics Card - ATI Radeon 9250 PCI 256mb ddr
if you need any other stats just say
i was just playing around with the configurations and if i use the zeroGS setting then i only get the error message saying "the GS plugin failed to open/initiallize"

It means that your video card doesn't support Pixel Shader 2 which is the minimum requirement to use ZeroGS/GSdx.
There is one really old version of GSdx which will allow you to play on pcsx2 but most likely you'll have a lot of graphical problems,crashing,freezing and a lot slower speed compared to the current GSdx